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Welynton222
@Welynton222
November 2019
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Podemos dizer que o conjunto solução da equação x² + 9x - 10 = 0, é?
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lopesilva7
x² + 9x - 10 = 0
a = 1 b = 9 c = - 10 Δ = b² - 4.a.c
Δ = 9² - 4. 1 . (-10)
Δ = 81 + 40 -----------Δ = 121
x = (- b +- √Δ)/2.a
x = (- 9 +- √121)/2.1 ---------> x = (- 9 +- 11)/2 -------> x' = (-9 - 11)/2
x' = -20/2 x' = - 10
x" = (-9 + 11)/2 ----------> x" = 2/2 ------x" = 1
S = { - 10 , 1 }
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Lista de comentários
x² + 9x - 10 = 0
a = 1 b = 9 c = - 10 Δ = b² - 4.a.c
Δ = 9² - 4. 1 . (-10)
Δ = 81 + 40 -----------Δ = 121
x = (- b +- √Δ)/2.a
x = (- 9 +- √121)/2.1 ---------> x = (- 9 +- 11)/2 -------> x' = (-9 - 11)/2
x' = -20/2 x' = - 10
x" = (-9 + 11)/2 ----------> x" = 2/2 ------x" = 1
S = { - 10 , 1 }